The present invention provides polymerization processes utilizing an ansa-metallocene catalyst system for the production of olefin polymers. Polymers produced from the polymerization processes have properties that vary based upon the presence or the absence of hydrogen and/or comonomer in the polymerization process.

The present invention relates to a process for preparing a diene elastomer. The invention especially applies to the production of a polybutadiene with a high level of cis-1,4 linkages that has at the same time a Mooney viscosity ML (1+4) greater than or equal to 40, a polydispersity index less than 2.1 and a reduced cold flow and of a polyisoprene. The process according to the invention comprises a reaction of a catalyst system with at least one conjugated diene monomer, this catalyst system being based on at least: one conjugated diene;one organic phosphoric acid salt of one or more rare-earth metals, said salt being in suspension and in at least one saturated and aliphatic or alicyclic, and inert hydrocarbon-based solvent;one alkylating agent composed of an alkyl aluminum for formula AlR3 or HAlR2 anda halogen donor belonging to the family of alkylaluminium halides, with the exclusion of alkylaluminium sesquihalides. This process comprises a separate bringing together of the monomer(s) to be polymerized with at least one alkylaluminium compound of formula AlR3 or HAlR2 which is identical or not to the alkylating agent of said catalyst system, said amount being chosen as a function of the characteristics of the polymerization medium and/or the polymerization conditions and/or said elastomer to be obtained.

A method for preparing a catalyst system for heterogenous catalysis of an isobutylene polymerization reaction includes the steps of forming an alumina support in which the alumina support has pores formed therein, and reacting BF3/methanol catalyst complex with the alumina support. The ratio of methanol to BF3 in the catalyst complex ranges from 0.5 moles to 2 moles of methanol per mole of BF3. The alumina support is formed so as to have pores each having a diameter of greater than twenty nanometers. The alumina support can be in the form of beads or extrudates having a length significantly greater than a diameter. The extrudate can also have a tri-lobe configuration.

A true tetrafluoroethylene (TFE) copolymer of the fine powder type is provided, wherein the copolymer contains polymerized comonomer units of at least one comonomer other than TFE in concentrations of at least or exceeding 1.0 weight percent, and which can exceed 5.0 weight percent, wherein the copolymer is expandable, that is, the copolymer may be expanded to produce strong, useful, expanded TFE copolymeric articles having a microstructure of nodes interconnected by fibrils. Articles made from the expandable copolymer may include tapes, membranes, films, fibers, and are suitable in a variety of end applications, including medical devices.

Provided are: a method for controlling the decoloration reaction rate and color density of a fast light-modulating material to levels suitable for practical use; and a fast light-modulating material having a decoloration reaction rate and a color density which are suitable for practical use. A polymer obtained by polymerizing a paracyclophane-bridged hexaarylbisimidazole compound having a radical-polymerizable group, and a copolymer obtained by copolymerizing the compound with a (meth)acrylic acid compound or a sensitizer having a radical-polymerizable group can achieve controlled decoloration reaction rates, photosensitivity and color tones.

The present invention relates to a polymer composition that includes a polymer having at least one polymer segment represented by the following Formula (I), With reference to Formula (I): M independently for each w is a residue of a monomer; φ is a residue of a mechanochromic compound having at least two reactive groups that are each independently bonded to one monomer residue M; w, independently for each z, is an integer of at least 1; and z is an integer of at least 2. The mechanochromic compound is selected from at least one of the following, (a) a spirooxazine compound represented by the following Formula (II), and (b) an indenonaphthopyran represented by the following Formula (III),

A method for producing a copolymer includes reacting a first monomer with a second monomer using a Pd-based catalyst, wherein the first monomer is a first hetero cyclic compound which includes a first hetero atom selected from S, N, and O, the first hetero cyclic compound in which a carbon atom adjacent to the first hetero atom is coupled with at least one hydrogen atom, and the second monomer is a second hetero cyclic compound which includes a second hetero atom selected from S, N, and O, the second hetero cyclic compound in which the second hetero atom is coupled with a carbon atom in which a halogen group selected from Br, Cl, and I is substituted.

The invention relates to a method for preparation of platinum siloxane compounds containing at least one CO ligand molecule (Pt carbonyl siloxanes). The method comprises reacting gaseous carbon monoxide (CO) with a platinum siloxane compound, preferably a platinum vinyl-cyclosiloxane compound, in solution with an organic solvent. The method is straightforward and applicable to industrial scale. With this method, specific isomers of platinum carbonyl vinylcyclosiloxanes are prepared, in which the two η-2-ethenyl groups coordinated to the Pt atom are bonded in trans-configuration relative to the cyclosiloxane backbone. The Pt compounds obtained by the method are used as catalysts for hydrosilylation and for crosslinking and curing of siloxanes and silanes.

A vehicle barrier system comprises a housing, substantially vertical members, a barrier member, and an actuation assembly. The barrier member is coupled with the substantially vertical members. The barrier member is configured to stop a moving vehicle when the substantially vertical members are in a raised position relative to the housing. The actuation assembly is operable to selectively raise and lower the substantially vertical members relative to the housing to selectively deploy and retract the barrier member relative to the housing. The actuation assembly comprises a powered rotary actuator mounted to the barrier member. The actuation assembly is operable to convert rotary motion from the rotary actuator into linear movement of the barrier member. A counterweight provides opposing mass and vertical motion relative to the barrier member.

A road safety barrier having a plurality of ropes supported by posts rigidly mounted on or in the ground is described. Each rope is held in tension against the posts and supported in a notch or groove in a side of the posts. The ropes are released from a post and the post is not pulled from the ground when a vertical force is exerted on the rope. The ropes when weaved are tensioned against the posts and this gives use to a combined frictional resistance to displacement of the ropes relative to each post along the length of the safety barrier. The structure of at least some of the posts and/or their mounting with respect to the ground defines a minimum bending yield strength in a direction along the length of the barrier. This minimum bending yield strength is greater than the bending moment resulting from the combined frictional resistance forces acting on the post.

A method of constructing a pump island protector to alleviate continuous maintenance required for a deteriorating existing steel pump island base, and a pump island protector constructed by the method. Using an adjustable form system and the combination of stainless steel members and new concrete, the existing pump island is re-wrapped with the stainless steel member and the new concrete.

A road marker and related light based warning device are described. The road marker or device includes a thermal sensor that triggers the illumination of at least one light-emitting diode at a predetermined temperature. The temperature may be associated with ice formation. The light-emitting diode(s) may flash to alert motorists to hazardous road conditions. The road marker or device utilize simple components to increase reliability, particularly when the device is subjected to high heat such as when the device is mounted into hot tar seal. The device further includes a switching element that prevents rapid on/off cycling.

A method of constructing a pump island protector to alleviate continuous maintenance required for a deteriorating existing steel pump island base, and a pump island protector constructed by the method. Using an adjustable form system and the combination of stainless steel members and new concrete, the existing pump island is re-wrapped with the stainless steel member and the new concrete.

An auxiliary member for pavement construction, including: a cylinder, a base plate and a leveling bolt; the cylinder includes a first cylinder part and a second cylinder part which are connected and communicated with each other, the first cylinder part is provided with a sling installing member and a slurry inlet, bottom of the second cylinder part is connected with the base plate, the base plate is provided with a bolt extending hole and multiple slurry discharging holes which are communicated with the inner cavity of the second cylinder part, the leveling bolt includes a bolt head and a screw, the screw extends through the bolt extending hole, the bolt head is arranged in the second cylinder part and the bolt head is smaller than the inner diameter of the second cylinder part. The present invention further provides a concrete slab and a method for pavement construction.

A storm grate locking device and method of use with a lock body. The lock body has at least one hook arm engaged with a latch assembly, a security flange nut engaged with the latch assembly, and a deep well socket. When the lock body is placed into the recessed area of a storm grate; and the hook arm engaged with the latch assembly may be extended to extend under the storm grate thereby preventing removal of the storm grate by rotating the security flange nut.

A surface drainage structure formed above a subgrade may include an elongate drain conduit disposed partially within the subgrade. The elongate drain conduit may define at least one drain slot extending through a wall thereof. The structure may include a pavement layer with an exposed top surface and a drainage channel extending therefrom. The drainage channel may be in fluid communication with the drain slot of the elongate drain conduit. A method of forming the surface drainage structure includes placing the elongate drain conduit in the subgrade, forming the pavement layer, cutting an upper channel along the elongate drain conduit, and cutting a lower channel and the drain slot in the elongate conduit.

A vehicle barrier fence for arresting an impacting vehicle of substantial mass within a selected distance of the fence. The fence having, in part: a retaining structure, at least one cable having a first end comprising a cable terminator, a post having an orifice defined there through sized to receive the cable terminator into the post, and a cable retainer for retaining the cable terminator within the post.

A form-fitting connection between two components (5 and 14) has a break-away function in one direction. At least one connection element, designed as a shear bolt (6), is formfittingly connected to the first component (5) to be connected. The end of the shear bolt (6) is formfittingly and functionally connected to a second component (14) via an attached component (17) that is resilient in the direction of the formfitting connection.

A method for repairing an aged or damaged asphalt pavement is provided. The method involves preparing a surface of the aged or damaged asphalt pavement by filling in deviations from a uniform surface plane with dry aggregate and compacting the dry aggregate; applying a reactive asphalt emulsion to the prepared surface; and passing an emitter over the prepared pavement, wherein the emitter generates electromagnetic radiation having a wavelength of from 2-5 mm that penetrates into the pavement to a depth of at least 2 inches. The asphalt pavement is repaired by disturbing voids and interstices in the damaged pavement without dehydrogenation of the asphalt, such that oligomers present in the aged asphalt are linked together into longer polymer chains to improve ductility of the aged asphalt.

A grader blade mounted to a support frame has an auger-grinder mounted ahead of the grader blade. The auger-grinder has a first helical vane fixed to a rotatable axle with a plurality of teeth attached to and protruding outwardly from the auger. A shroud above and partially surrounding the auger-grinder has an inner shroud end wall, an outer shroud end wall and bearings in which the axle is journaled transverse to the direction of travel. A beater is fixed to the axle between an inner end of the helical vane and the inner wall. The beater has a plurality of paddles extending outwardly from the axle. An inner barrier wall is attached to the inner shroud wall and extends forward of the auger-grinder. A drive link is connected to the axle for connection to a prime mover for driving the axle in rotation.

A mobile thermoplastic applicator comprises a kettle, a main gas burner, a heat exchanger plenum, and a screed die box. The kettle has walls which define an interior space for melting thermoplastic. The main gas burner is situated beneath the kettle, and is configured to heat the kettle. The heat exchanger plenum is situated inside the thermoplastic kettle and is configured to subdivide the interior space and circulate heated air from the main gas burner. The screed die box is configured to receive molten thermoplastic from the kettle and deposit that molten thermoplastic on a surface.

A pylon is provided for providing visual signals to race participants. The pylon includes a base. A shell is carried on the base. The shell is formed having an outer wall surrounding an internal chamber. The internal chamber includes a wedge-shaped portion which carries a wedge-shaped luminaire. An upwardly-extending tube is carried by the base. The tube is nested within the internal chamber and carries the shell. A power source is provided which provides electricity to the luminaire. A wireless transmitter is provided which is used by a user to turn the luminaire on and off, which luminaire provides visual signals to the race participants.

A track system may include a plurality of connected slat members that may form rollable tracks. The rollable tracks may be used in moving vehicles across sensitive ground. The rollable track may be deployed using various methods and/or apparatus such as, e.g., deployment apparatus including one or more spool portions for rolling and unrolling the rollable tracks.

A method for laying down a pavement in which a compaction unit such as a tamper pre-compacts the paving material with a selectable stroke and at a selectable frequency while the pavement having a selectable pavement thickness is in the process of being laid down at a selectable paving speed, the stroke of the compaction unit is automatically adjustable in response to paving parameters, such as the paving speed and/or the pavement thickness, along a characteristic curve or in a characteristic map. The compaction unit includes an adjusting mechanism which is operable during the paving operation for adjusting the stroke of the compaction unit.

An automatic pitch control system for riding power trowels enables a user to control and automatically adjust trowel blade pitch and height for concrete finishing. The disclosed system provides for blade pitch of separate rotor assemblies to be adjusted independently of one another or synchronously. The disclosed system also provides for a mode of operation that allows the user to completely flatten trowel blades for panning.

A vehicle access control system includes an elongate, generally hollow, generally planar base platform having a first and a second distal end. A generally hollow enclosure is atop the base platform. A first lift gate is intermediate the enclosure and the first distal end of the base platform, while a second lift gate is intermediate the enclosure the second distal end of the base platform. A first lift arm is pivotally coupled to the first lift gate and extends generally perpendicularly away from a longitudinal axis of the base platform. Likewise, a second, opposing lift arm is pivotally coupled to the second lift gate and extends generally perpendicularly away from the longitudinal axis of the base platform. The base platform is configured for direct contact with a mounting surface. In addition, the vehicle access control system is transportable as a unit.

A system for converting an existing traffic intersection into an intersection having a roundabout traffic control feature includes a center island framework, one or more splitter island frameworks, and one or more diverter frameworks. The frameworks are secured to the road surface, and fill material is added to free spaces defined in the frameworks to thereby form a center island, one or more splitter islands, and one or more diverters. The system allows a roundabout to be implemented into an existing intersection on a temporary or semi-permanent basis, in a minimal amount of time and without requiring significant construction at the site of the intersection.

A The manhole cover is described with a supporting structure device comprising force distribution ribs for supporting a top surface of the manhole cover which can be driven over, and a hollow force distribution cylinder arranged substantially centrally, in particular a circular force distribution cylinder, for supporting the force distribution ribs, characterised by a force distribution plate to relieve the load on the force distribution cylinder, wherein the force distribution plate at least substantially completely covers an underside of the force distribution cylinder in relation to the top surface, and wherein the force distribution ribs transform smoothly into the force distribution plate.

A manhole cover assembly configured to behave as a relief valve in an explosion event, opening so that fluid, such as air or explosive gas, may vent from an underground area. The manhole cover assembly may include a manhole cover and a frame, and may be configured to limit movement of the manhole cover with respect to the frame in response to increased pressure on the manhole cover. In one embodiment, the manhole cover may include legs that are configured to enable a range of movement of a portion of the cover such that the cover can be unseated at an angle with respect to the frame to allow fluids to escape from the underground area.

A system for measuring the height of paving material distributed by an auger of a paving machine in front of a grading implement, such as a screed, is disclosed. The system includes a sonic sensor and a laser pointer. The sonic sensor generates a sonic signal which is directed at the paving material distributed by the auger. The laser pointer generates a laser beam which is similarly directed at the paving material that has been distributed by the auger. The laser beam and the sonic signal meet at a common position on the paving material.

Disclosed is an automotive road construction machine, particularly a recycler or a cold stripping machine, comprising an engine frame that is supported by a chassis, a working roller which is stationarily or pivotally mounted on the engine frame and is used for machining a ground surface or road surface. The chassis is provided with wheels or tracked running gears which are connected to the engine frame via lifting column and are vertically adjustable relative to the engine frame. Each individually vertically adjustable lifting column is equipped with a device for measuring the actual vertical state of the lifting column.

A system and method are provided for coupling a manhole cover to an underground utility box to support the manhole cover substantially flush with a ground surface such as a roadway. A holder couples to an underground utility box and includes upper and lower ends and a channel extending therebetween, and a support structure extending into the channel and defining an upwardly facing support surface. An adjustment member for coupling to a manhole cover is inserted within the channel, and includes upper and lower ends, and a passageway extending therebetween and communicating with the channel. The adjustment member is movably receivable within the channel to be seated on the support surface, and to define an adjustment space between the adjustment member and the holder. The adjustment member may thus be adjusted for accommodating a slope and elevation of a ground surface, and sealed with the holder after adjustment.

A method for installing a paver system includes positioning a first grid substrate adjacent to a second grid substrate, the first and second grid substrates form a paver support surface. At least the first grid substrate includes an integrated boundary ridge extending along the first paver support surface. The first grid substrate is interlocked with the second grid substrate with a first paver piece bridging the first and second grid substrates to form a paver linkage. Movement of at least the first paver piece is arrested beyond the integrated boundary ridge by directly or indirectly engaging at least the first paver piece against the integrated boundary ridge. In another example, movement of the first paver piece is arrested by anchoring at least the first paver piece on the first and second paver support surfaces through distribution of forces incident on at least the first paver piece through the paver linkage.

A mat with an upper road side and a lower ground contacting side, the mat comprising: a frame supporting one or more boards; and a grapple receiver formed in an interior portion of the mat and indented from one or both of the upper road side and the lower ground contacting side to allow grapple jaws to grip the grapple receiver between the grapple jaws.

A method and a system for applying a road surface using a mixing plant for producing laying material, a road finishing machine processing the laying material to a road surface, and a supply chain transporting the laying material from the mixing plant to the road finishing machine. Request commands are transmitted from the road finishing machine to the mixing plant and/or to the supply chain, and, depending on these request commands, the production rate of the laying material in the mixing plant, the temperature of the laying material produced in the mixing plant, and/or the mass flow of laying material supplied to the road finishing machine per time unit by means of the supply chain are adjusted.

A combined stair screed and float device for quickly and efficiently spreading and smoothing wet concrete comprising a generally shoe shaped member with a vertically and horizontally adjustable top guide and base bar to rest on riser forms. In operation, a user rests the top guide and the base bar on two riser forms with a pointed corner finder floating over the concrete at the desired corner position. The user grasps a grip portion and a handle and guides the device across the tread in a simultaneous screed and float step preparing a smooth surface for finishing. The device is both vertically and horizontally adjustable to accommodate a full range of conceivable step heights, tread lengths, toe kick overhang lengths, and corners.

This invention provides a modular ducting section and a networked utilities ducting system and rain and road water management system formed from two or more modular ducting sections laying end-to-end. Each modular ducting section comprises open-topped utility channels for carrying utility service supply lines such as electricity, gas, water, or communications, an open-topped catchment channel for carrying rain water captured from a building structure or garden, and a supply channel for supplying an end user with utility services via a supply line, while also allowing the end user to feed an end-user generated utility supply back into the corresponding utility service supply line via a return line. Each modular ducting section further comprises a road water runoff flange and a main channel cover, which when combined, form a curb-side structure that functions to keep any contaminated road water from the reusable rain water collected in the catchment channel.

A method of repairing cracks in a paved surface includes identifying at least one crack in the surface that needs to be repaired. The crack is then filled with an asphalt sealer including approximately 40-55% by weight of slag sand.

A manhole cover assembly includes a manhole structure, a manhole frame carried by the manhole structure and a manhole frame grout cementing the manhole frame to the manhole structure. The manhole frame grout includes a grout mixture having an epoxy resin, a curing agent and an aggregate. The epoxy resin and the aggregate are present in the grout mixture in an epoxy resin:aggregate weight ratio of about 0.09. A removable manhole cover is carried by the manhole frame. A manhole cover assembly fabrication method is also disclosed.

The present invention provides a system and method for controlling an asphalt repair apparatus. An additional aspect of the present invention is to provide a system that may position a heater repair element adjacent a targeted asphalt surface, acquire and analyze surface and heater sensing data, and control heater output to prepare the targeted asphalt surface for repair. Further, the system may be configured to control an asphalt repair apparatus to satisfy user-defined asphalt repair requirements.

A wedge-shaped vehicle barrier, including a top assembly pivotably coupled to a bottom assembly; a mechanism coupled to the top assembly and coupled to the bottom assembly, where the mechanism moves the top assembly between a first position that is substantially horizontal and a second position at a first angle; and one or more flexible slings coupled to a distal portion of the top assembly and a distal portion of the bottom assembly, where the one or more slings prevent the top assembly from rotating beyond a second angle when the top assembly is engaged by a vehicle, the second angle being greater than or equal to the first angle.

A construction machine according to the disclosure comprises a material hopper for receiving bulk material. Moreover, the construction machine includes a material conveying system for conveying bulk material. The material conveying system comprises at least one conveying screw in the area of the hopper. A gap extends underneath the at least one conveying screw, and the gap has a cross section that varies in a conveying direction of the at least one conveying screw.

A concrete finishing machine includes a mobile frame supported above the slab on front and rear wheels with at least one screed roller and a plurality of vibrators are suspended from the frame between the front and rear wheels. The front and rear wheels are rotatable at least ninety degrees between a longitudinally directed traveling orientation and a laterally directed concrete finishing orientation. The front and rear wheels are driven and steerable so that the mobile frame may travel longitudinally down a lane of a road, and then upon pivoting of the wheels, move laterally over a hole in an adjacent lane having uncured concrete to be finished by the finishing machine.

Road paver with a towing machine and a movable screed and with a measuring device that is provided for determining a layer thickness of a road pavement that has been newly laid by the screed. The measuring device is formed to determine the layer thickness at an intended location, seen relative to a direction of travel, behind a rear edge of the screed, whereby the measuring device is provided on the road paver such that the layer thickness can be determined independently of a geometric shape and/or a movement of the screed.

The present invention relates to an ADA compliant detectable warning or guidance tile for pedestrian platforms, walkways, and sidewalks and the like having a detectable warning surface containing raised truncated domes detectable by the visually impaired in accordance with Americans with Disabilities Act (ADA): Accessibility Guidelines for Buildings and Facilities and being provided with one or more additional means on the top surface of the tile to provide visual or tactile information to sighted and visually impaired pedestrians.

The present invention relates to a stripping device for a drum of a soil compaction roller, in particular, a stripping device for a drum of a trench roller, wherein the stripping device comprises a first scraping element disposed on a drum surface. The drum surface is provided with protrusions disposed on the periphery of the drum surface, wherein a drum extender is adapted to be attached to the drum. Provision is also made for the stripping device to have a second scraping element which is mounted on the first scraping element in an axially displaceable manner, wherein the second scraping element is adapted for attachment to the first scraping element by means of at least one fixing means.

A vibratory compactor having a first compacting element having a variable vibratory mechanism that sets a modifiable compaction effort, a second compacting element, a first sensor configured to measure a first surface compactability associated with the first compacting element, a second sensor configured to measure a second surface compactability associated with the second compacting element and a control system. The control system is configured to receive the first surface compactability, receive the second surface compactability, determine a target compaction effort for the first compacting element based on the first surface compactability and the second surface compactability, and modify the variable vibratory mechanism to set the compaction effort at the target compaction effort.

In a method of milling asphalt, a relative elevation of an unmilled asphalt pavement surface adjacent to an area to be milled is sensed with respect to a milling machine body and rotatable milling drum of the milling machine. An elevation of a bottom surface of the rotatable milling drum is determined using a computer processor. Based on a map, stored in a computer memory, of a design surface specifying a design elevation of a milled surface over the area to be milled, the elevation of the milling machine body and the rotatable milling drum are automatically adjusted such that the rotatable milling drum mills the asphalt surface to the design elevation over the area to be milled.

An apparatus and method to install contraction joints in concrete slabs. The method uses a device, which inserts a strip of plastic or paper tape into freshly laced concrete, as the device is driven across a concrete slab. The tape is folded immediately prior to being inserted into freshly placed concrete, and functions to weaken the slab at the contraction joint location for the purpose of causing a crack to form in the slab. Plastic tape can be used, which functions as a moisture vapor retarder, and thereby, protects floor coverings from moisture damage, such as mold and mildew, at contraction joint locations.

A paver for laying down a strip of concrete and inserting therein dowel bars parallel to the strip. A dowel bar inserter orients the bars and places them into the concrete. A pair of transport chains transverse to the travel direction extends across a width of the inserter. Pairs of generally L-shaped opposing cups hold the bars so that they can drop downwardly from the cups towards the strip. The chains move in a single direction. A dowel bar holding magazine, above the chains, stores bars, and gravitationally moves the bars towards the chains for pick-up by cups as the chains move the cups past a bar loading station. Elastic bands extend about a bar engaging surface defined by a wheel and resiliently bias the bars moving along the chain turn-around section against the wheel.